doc: remove empty line in YAML block

PR-URL: nodejs#44617
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Daeyeon Jeong <[email protected]>
Reviewed-By: Richard Lau <[email protected]>

Author: ovflowd

doc/api/process.md

@@ -3644,7 +3644,6 @@ changes:
     - v12.19.0
     pr-url: https://github.com/nodejs/node/pull/32499
     description: Calling `process.umask()` with no arguments is deprecated.
-
 -->
 
 > Stability: 0 - Deprecated. Calling `process.umask()` with no argument causes